261948884743 has 24 divisors (see below), whose sum is σ = 328225380000. Its totient is φ = 207212281920.

The previous prime is 261948884741. The next prime is 261948884761. The reversal of 261948884743 is 347488849162.

It is not a de Polignac number, because 261948884743 - 2¹ = 261948884741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261948884741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3143233 + ... + 3225493.

It is an arithmetic number, because the mean of its divisors is an integer number (13676057500).

Almost surely, 2^261948884743 is an apocalyptic number.

261948884743 is a deficient number, since it is larger than the sum of its proper divisors (66276495257).

261948884743 is a wasteful number, since it uses less digits than its factorization.

261948884743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87287 (or 87280 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 64.

The spelling of 261948884743 in words is "two hundred sixty-one billion, nine hundred forty-eight million, eight hundred eighty-four thousand, seven hundred forty-three".